The complexity and flexibility of D3.js results in it being a time-consuming tool to learn for many users. D3 is incredibly flexible; probably more so than any other JavaScript visualization library at the time of this posting. With that flexibility comes increased complexity. If you just want to...

Google Charts has a large selection of chart types to get started with and have up in running in very little time. It uses sensible defaults, but has flexible options to allow for customization when needed. Better than most other free to use Chart APIs and has great documentation provided by Googl...

If you are just starting off with a JavaScript charting library you shouldn't invest your time learning jqPlot. Once a great tool it hasn't been updated in several years and there is virtually no activity on the Google Groups forum these days.